The purpose of this paper is to describe a device that passively detects the presence of a warm-bodied object in a specified area. The detecting device used is a pyroelectric detector with an integral optical filter. By focusing infrared radiation generated by the object onto the detector, the resulting temperature change is converted to a voltage and then amplified. Modulation of the incoming radiation is accomplished by a rotating disk whose speed of rotation is dynamically controlled by a microprocessor. The resulting detector response is filtered and converted to a DC level. The signal is then passed through an analog-to-digital converter and sampled by the microprocessor.
Martin, Robert J.
Master of Science (M.S.)
College of Engineering
Length of Campus-only Access
Doctoral Dissertation (Open Access)
Fields, Randy R., "Motion and Intrusion Detection Using a Pyroelectric Detector" (1987). Retrospective Theses and Dissertations. 5073.